Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aff952467058f51…

MALICIOUS

PDF

36.8 KB Created: 2021-05-20 19:36:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5646e3032a19cf81b2a70365457eecc7 SHA-1: 562fc857174fda8c4fa3b0ef742f9193d6025023 SHA-256: 3aff952467058f516c03c362091a40c98b078498ec0ba90a864aa4e93df39091
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to websites offering 'game hacks' and 'generators', a common lure for malicious activity. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies this pattern. While no scripts were directly extracted, the nature of the links suggests a potential for further payload delivery or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-hack-without-verification-code-game-hack In PDF document text
    • https://www.legclub.org/uploads/files/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003400.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3400 24980 bytes
SHA-256: ffe5ad9a081fb1a645781e921736c9d101952a0ccdd99209a32eabbeeaacb3e0
font_01_sfnt_off00006d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 18528 bytes
SHA-256: 73698aa0d04f612b8edcfc98417ef0f8be184b3e572c91f5f0109cbf791ef469

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